Well not wrong, but for me the Nema wires are different colours to mine. The Colours on the diagram are, RED GREEN YELLOW BLACK Now my Nema 17 and the 3 23s (All bought from here in the US) are slightly different, RED BLACK BLUE GREEN Personally I'd just connect the Blue in place of the Yellow, but I don't want to wire it wrongly as it might damage something. Has anyone else had Nema's with the same wiring as mine and if yes, did you do as I suggested above. Please let me know as this is the last part of this build. Thanks a lot.